Trigonometry Examples

$\cos (x) = \sin (20 - 30)$

Step 1

Simplify $\sin (20 - 30)$ .

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Step 1.1

Subtract $30$ from $20$ .

$\cos (x) = \sin (- 10)$

Step 1.2

Evaluate $\sin (- 10)$ .

$\cos (x) = - 0.17364817$

Step 2

Graph each side of the equation. The solution is the x-value of the point of intersection.

$x \approx 0.99557428 + 2 π n, 5.28761101 + 2 π n$ , for any integer $n$

Step 3